/ Dictionary / Index I ironside: Meaning and Definition of Find definitions for: i•ron•side Pronunciation: (ī'urn-sīd"), [key] — n. a strong person with great power of endurance or resistance. (cap.) an epithet or nickname of Edmund II of England. (cap.) Usually, (used with a sing. v.) a nickname of Oliver Cromwell. the soldiers serving under Cromwell. an ironclad. Eastern U.S.scup. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ironside (Thesaurus) iron-sick ironsmith Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language